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Honeywell
NO DELAY
V
ϕ
CURRENT (I)
VOLTAGE (V)
V
www.honeywell.com/imc
CD3000M-1PH from 125A to 700A
WITH DELAY
I
∆t
t
LINE VOLTAGE
T
LOAD SUPPLY
T
7.5 Delay Triggering+Burst
Firing (DT + BF)
It's
used
transformer coupled with resistive load on
secondary. It's used to prevent inrush surge
CURRENT (I)
current when zero voltage switching is used
VOLTAGE (V)
and to avoid fuse blowing. Every time that
t
auxiliary voltage supply of PCB board is
switched ON, the unit starts in phase angle
for 1 sec., after witch it switches OFF when
the supply waveform is negative and starts
again when is positive, giving a delay on
triggering signal on first halt positive cycle. If
circuit board is maintained under voltage
phase angle start is not used.
7.6 Phase Angle ( PA)
With Phase Angle is possible to control the
power to the load allowing to Thyristor to be
in conduction for a variable part of the
voltage supply halt cycle. The load power
can be adjusted from 0 to 100% as a
function of analog input signal, normally
delivered by temperature controller or by
potentiometer. Normal it's used with inductive
loads. The only disadvantage with phase
angle is the generation of interferences that
can be reduced with filters.
30
User's Manual
to
switch
ON-OFF
primary
of
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